Bucket structure



June 18 1963 R. J. scHRoEDER 3,093,917

BUCKET STRUCTURE Filed Deo. 6, 1961 United States Patent O 3,093,917BUCKET STRUCTURE Robert J. Schroeder, Deerfield, Ill., assignor toAllis- Chalmers Manufacturing Company, Milwaukee, Wis. Filed Dec. 6,1961, Ser. No. 157,359 8 Claims. (Cl. 37141) This invention relates tobucket structure and particularly to excavating buckets of the type usedon tractor loaders.

It is an object of this invention to provide a bottom structure for abucket which has superior strength to provide art bucke-t structures.

lt is a further object of this invention to provide a bucket structurehaving a new and improved core construction.

It is a further object of this invention to provide a bucket bottomstructure having a backup plate behind the bucket blade and diggingteeth with upper and lower legs extending rearwardly to be secured tobucked bottom through the backup plate and through the blade.

It is a further object of this invention to provide a bottom structurewith removable teeth which reinforce the bucket bottom 'when installed.

These and other objects and advantages of this invention will becomeapparent to those familiar with the art when the following descriptionis read in conjunction with the drawings in which:

FIG. 1 is a side View of a present invention;

FIG. 2 is a section of FIG. 1;

FIG. 3 is a section of FIG. 2;

FIG. 4 is a section view of FIG. l; and

FIG. 5 is a section View of FIG. 1.

Referring to the drawings, the bucket includes a pair of upstanding sidewalls `6, 7 which are secured by welding to a bottom wall 8. The bottomwall 8 has a front `flat section 9 and an upwardly sloping section `11extending rearwardly from the front section. The rear wall 12 of thebucket is a continuation of the bottom wall 8. Brackets 13 are securedto the rear wall 12 to provide mounting points 14, -16 for attachment tosuitable tractor mounting linkage. The bottom and sides of the bucketare reinforced by a wraparound plate -17 on the underside of the bucket.The wrap-around plate 17 extends upwardly at the laterally oppositesides of the bucket as shown in FIGS. 4 and 5 and is welded to the sidewalls 6, 7. Wrap-around plate `17 has a forward portion 18 which liesbeneath and is Welded to ilat section 9 of the bottom wall 8. Arearwardly extending portion 19 of plate 17 is substantially coplanarwith the forward portion 9 and extends rearwardly beneath the upwardsloping section 11 in vertically spaced relation thereto. To add furtherstrength to the bottom core construction, a channel member 21, withyflanges 22, 23 diverging from a dat bottom web 24, extends the width ofthe bucket and has its ange edges welded to the upward sloping portiony11 of the bottom 3. The wrap-around plate 17 is secured as by weldingto the channel 21 adjacent the junction of its flange 22 and web 24. Theweb 24 is substantially a continuation of the underside of the bucketbottom structure. The wrap-around plate 17, bottom 8 and the channelmember 21 form a core construction for the bucket bottom, which isclosed at the ends by addition of end plates 26, 27 welded to the sidewalls 6, 7 and the ends of the channel 21.

A wrap-around blade 31 is secured to the bottom wall bucketincorporating the view taken along the line II-ll view taken along theline III-JH taken along the line IV-IV taken along the line V-V 8 andthe wrap-around plate `17 by rivets 32 extending through the forwardflat portion 9 of bottom wall 8 and the forward portion 18 of plate 17.Rivets 33 secure the upward extending ends of blade 31 to the wraparoundplate 17 and side walls of the bucket. As is the practice in the trade,the cutting blade 31 may be removed by cutting the rivets byconventional means. A replacement blade may then be installed. A backupplate 34 is welded to the underside and vertical sides of theWrap-around plate 17. The forward sides of the bucket are reinforced bystrips 51, 52 welded to the side walls 6 and 7, respectively. The backupplate 34 is slightly thinner than the rearwardly extending portion ofblade Transversely spaced excavating teeth 41 are secured to the bottomof the bucket to aid in digging. Each tooth has an upper rearwardlyextending leg 42 and a lower rearwardly extending leg 43. As shown inFIG. 3, a bolt 44 extends through holes in the upper and lower legs ofthe tooth 41, the bottom wall flat section 9, the forward portion I1S`and plate 34, and, together with nut 46, secures the rear end of thetooth to the bucket bottom. A bolt 47 extends through holes in the upperand lower legs -of the tooth 41 and through holes in the front section9, forward portion 18 and blades 31. Bolt 47 and nut 48 rigidly securethe forward portions of the legs 42, 43 to the bottom structure.

In the noninstalled condition of the tooth the legs 4t2, 43 are apartslightly further than when installed to permit the tooth to be slideasily in place. A recessed portion `di? permits the bottom leg of thetooth to be sprung suiiiciently to be drawn up tight as illustrated.

When the teeth 41 are installed on the bucket, it will he noted thatthey bridge the gap between the removable cutting blade 31 and thebackup plate 34. This construction provides a stronger bucket than onewithout teeth. In constructing a bucket with `digging teeth strength isvery important since such a bucket is subjected to greater stresses inview of their being used for prying out rocks, etc. The teeth extend thelongitudinai dimension of the bucket bottom, thereby increasing theleverage on the bottom structure `during prying out operations.

From the foregoing it is obvious that an extremely strong bucket bottomhas been provided. The core construction of the bottom extends from therear end of the tooth to the rear of the bucket. The front section of mynovel bucket construction permits a detachable blade to be secured andpermits detachable teeth to be mounted in bridging relation to theremovable blade 31 and the backup plate 34. This -bucket construction iseconomical to fabricate, gives Ilong trouble free service and isextremely strong for its weight. Also, the reinforcing teeth, actuallyserve t-o strengthen the bucket sufliciently to hold up under theadditional stresses to which the bucket is subjected because of theaddition of the teeth.

Although a single embodiment of this invention has be understood that itis intended that the claims should cover other embodiments which comefairly within their scope.

What is claimed is:

1. An excavating bucket comprising: a pair of spaced upstanding sidewalls; a longitudinally extending bottom wall rigidly secured at itslaterally opposite ends to the bottom ends of said side walls, saidbottom wall having a front flat section and an upward sloping sectionextending rearwardly from said front flat section; a wraparound platehaving a forward portion in underlying contact with the flat section ofsaid bottom wall and including upstairding end portions secured to thelaterally outer sides of said side walls, said wrap-around platepresenting a rearward extending portion substantially coplanar with saidforward portion and spaced vertically below said upward sloping sectionof said bottom wall; a wraparound cutting blade connected to the frontof the bottom and sides of said bucket; a backup plate rigidly securedto the underside of said wrap-around plate at the rear of and parallelto said blade, and a plurality of laterally spaced reinforcing teethhaving upper and lower legs secured to said bucket in bridging relationto the space between said blade and backup plate.

2. The structure set `forth in claim 1 and further including releasablefastening means for cach of said teeth including a rst fastening memberextending through said bottom wall, wrap-around plate, blade and legsand a second fastening member extending through said bottom wall,wrap-around plate, backup plate and legs.

3. The structure set forth in claim l and further comprising atransverse reinforcing member extending between and rigidly secured tothe rear end of said wraparound plate and said upward sloping section ofsaid bottom wall.

4. An excavating bucket comprising: a pair of spaced upstanding sidewalls; a longitudinally extending bottom wall rigidly secured at itslaterally opposite ends to the bottom ends of said side walls, saidbottom wall having a front flat section and an upward sloping sectionextending rearwardly from said front at section; a wraparound platehaving a forward portion in underlying contact with the at section ofsaid bottom wall and including upstanding end portions secured to thelaterally outer sides of said side rwalls, said wrap-around platepresenting a rearward extending portion substantially coplanar with saidforward portion and spaced vertically below said upward sloping sectionof said bottom wall; a channel member rigidly secured to the rear end ofsaid wrap-around plate and having lianges rigidly secured along theirlength to the underside `of said bottom wall; and a wrap-around cuttingblade connected to the front of the bottom and sides of said bucket.

5. The structure set forth in claim 4 and further comprising a backupplate rigidly secured to the underside of said wrap-around plate at therear yof and parallel to said blade.

6. The structure set forth in claim 5 and further comprising a pluralityof laterally spaced teeth each having an upper vleg extending rearwardlyabove said bottom wall and a lower leg extending rearwardly below saidbla-de and backup plate, and means securing said upper and lower legs tosaid bucket including a rst fastening member extending through saidbottom wall, wrap-around plate and blade and a second fastening memberextending through said bottom wall, wrap-around plate and backup plate.

7. An excavating bucket comprising: a pair of spaced upstanding sidewalls; la longitudinal-ly extending bottom wall rigidly secured at itslaterally opposite ends to the bottom ends of said side walls, saidbottom wall having a front at section and an upward sloping sectionextending rearwardly from said front flat section; a wraparound platehaving a forward portion underlying and secured to said flat section ofsaid bottom wall and including upstanding end portions secured to thelaterally outer sides `of said side walls, said wrap-around platepresenting a rearward extending portion substantially coplanar with saidforward portion and spaced vertically below said upward sloping sectionof said bottom wall; a wrap-around cutting blade connected to the frontof the bottom and sides of said bucket', a backup plate rigidly securedto the underside -of said wrap-around plate at the rear of and parallelto said blade, and a plurality of laterally spaced reinforcing teethhaving upper and lower legs secured to said bucket in bridging relationto the space between said blade and backup plate.

8. An excavating bucket comprising: a pair of spaced upstanding sidewalls; a longitudinally extending bottom wall rigidly secured at itslaterally opposite ends to the bottom ends of said side walls, saidbottom wall having a front llat section and an upward sloping sectionextending reanwardly from said front flat section; a wraparound platehaving a forward portion underlying and secured to said fiat section ofsaid bottom wall and including upstanding end portions secured to thelaterally outer sides of said side walls, said wrap-around platepresenting a rearward extending portion substantially coplanar with saidforward portion and spaced vertically below said upwand sloping sectionof said bottom wall; a channel shaped structure rigidly secured to therear end of said wrap-around plate and having flanges rigidly securedalong their length to the underside of said bottom wall; and awrap-around cutting blade connected to the front of the bottom and sidesof said bucket.

No references cited.

1. AN EXCAVATING BUCKET COMPRISING: A PAIR OF SPACED UPSTANDING SIDEWALLS; A LONGITUDINALLY EXTENDING BOTTOM WALL RIGIDLY SECURED AT ITSLATERALLY OPPOSITE ENDS TO THE BOTTOM ENDS OF SAID SIDE WALLS, SAIDBOTTOM WALL HAVING A FRONT FLAT SECTION AND AN UPWARD SLOPING SECTIONEXTENDING REARWARDLY FROM SAID FRONT FLAT SECTION; A WRAPAROUND PLATEHAVING A FORWARD PORTION IN UNDERLYING CONTACT WITH THE FLAT SECTION OFSAID BOTTOM WALL AND INCLUDING UPSTANDING END PORTIONS SECURED TO THELATERALLY OUTER SIDES OF SAID SIDE WALLS, SAID WRAP-AROUND PLATEPRESENTING A REARWARD EXTENDING PORTION SUBSTANTIALLY COPLANAR WITH SAIDFORWARD PORTION AND SPACED VERTICALLY BELOW SAID UPWARD SLOPING SECTIONOF SAID BOTTOM WALL; A WRAPAROUND CUTTING BLADE CONNECTED TO THE FRONTOF THE BOTTOM AND SIDES OF SAID BUCKET; A BACKUP PLATE RIGIDLY SECUREDTO THE UNDERSIDE OF SAID WRAP-AROUND PLATE AT THE REAR OF AND PARALLELTO SAID BLADE, AND A PLURALITY OF LATERALLY SPACED REINFORCING TEETHHAVING UPPER AND LOWER LEGS SECURED TO SAID BUCKET IN BRIDGING RELATIONTO THE SPACE BETWEEN SAID BLADE AND BACKUP PLATE.